head to head
vs
Diablo IIIvsSystem Shock 2
Diablo III leans Optimization (Pure Optimization); System Shock 2 leans Optimization (Pure Optimization).
Diablo IIISystem Shock 2
Axis by axis
Execution4 vs 6
System Shock 2 leans harder on execution: Weapon degradation and limited stats moderate the raw aim ceiling
Reads1 vs 0
Diablo III leans harder on reads: No meaningful adaptive opponent; co-op is cooperative
Variance5 vs 4
Diablo III leans harder on variance: Primal Ancient drops and set dungeon RNG drive the grind
Optimization9 vs 9
Even - both lean on optimization about the same.
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.